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Finding the Fourth Proportional to 561.36, 775.05 and 502.16

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Solution

The fourth proportional to 561.36, 775.05 and 502.16 is: 693.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.36 : 775.05 = 502.16 : x
  2. Step 2: Convert to fraction form
    561.36/775.05 = 502.16/x
  3. Step 3: Cross multiply
    561.36x = 775.05 × 502.16
  4. Step 4: Simplify right side
    561.36x = 389,199.11
  5. Step 5: Solve for x
    x = 389,199.11/561.36
  6. Step 6: Final answer
    x = 693.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.